[ 37.364125] audit: type=1800 audit(1546838058.836:27): pid=7562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.387074] audit: type=1800 audit(1546838058.836:28): pid=7562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.935001] audit: type=1800 audit(1546838059.476:29): pid=7562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 37.960564] audit: type=1800 audit(1546838059.476:30): pid=7562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.885629] ------------[ cut here ]------------ [ 63.890412] kernel BUG at net/core/skbuff.c:1459! [ 63.895456] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 63.900814] CPU: 0 PID: 7715 Comm: syz-executor289 Not tainted 4.20.0+ #13 [ 63.907815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.918722] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 63.923727] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 a6 ca 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 97 ca 68 fb 0f 0b e8 90 ca 68 fb <0f> 0b e8 89 ca 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 63.942793] RSP: 0018:ffff888090d775b0 EFLAGS: 00010293 [ 63.948146] RAX: ffff888084b18600 RBX: ffff8880a0f8e540 RCX: ffffffff86192268 [ 63.955402] RDX: 0000000000000000 RSI: ffffffff86192ca0 RDI: 0000000000000005 [ 63.962661] RBP: ffff888090d776f0 R08: ffff888084b18600 R09: ffffed10141f1cc3 [ 63.970229] R10: ffffed10141f1cc2 R11: ffff8880a0f8e617 R12: ffff8880a0f8e5fc [ 63.977484] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 63.984823] FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000f7f7bb40 [ 63.993701] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 63.999668] CR2: 0000000020000300 CR3: 00000000a0f9a000 CR4: 00000000001406f0 [ 64.006927] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.014190] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.021448] Call Trace: [ 64.024022] ? lock_acquire+0x1db/0x570 [ 64.027984] ? lock_downgrade+0x910/0x910 [ 64.032118] ? skb_release_data+0x970/0x970 [ 64.036421] ? lockdep_hardirqs_on+0x415/0x5d0 [ 64.041000] __pskb_pull_tail+0x13a/0x1740 [ 64.045224] ? _copy_to_iter+0x3a1/0x1400 [ 64.049369] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 64.054470] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.060096] ? __skb_try_recv_datagram+0x448/0x5b0 [ 64.065009] ? pskb_carve+0x1e20/0x1e20 [ 64.069084] ? __check_object_size+0xa3/0x77a [ 64.073581] ? iov_iter_copy_from_user_atomic+0xff0/0xff0 [ 64.079102] ? usercopy_warn+0x110/0x110 [ 64.083275] ? ___might_sleep+0x1e7/0x310 [ 64.087422] ? arch_local_save_flags+0x50/0x50 [ 64.092256] ? __fget+0x472/0x710 [ 64.095704] ip6_datagram_recv_specific_ctl+0x1751/0x1bd0 [ 64.101231] ? ip6_datagram_recv_common_ctl+0x5e0/0x5e0 [ 64.106599] ? skb_kill_datagram+0x130/0x130 [ 64.111008] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 64.116530] ? ip6_datagram_recv_common_ctl+0x37b/0x5e0 [ 64.121998] ? skb_copy_datagram_iter+0x10d/0x490 [ 64.126903] ? ipv6_recv_rxpmtu+0x920/0x920 [ 64.131223] ? skb_copy_and_hash_datagram_iter+0x50/0x50 [ 64.136718] ip6_datagram_recv_ctl+0x34/0x40 [ 64.141121] rawv6_recvmsg+0xc43/0xe90 [ 64.144989] ? aa_sk_perm+0x234/0x8e0 [ 64.148775] ? rawv6_rcv_skb+0x470/0x470 [ 64.152820] ? __fget_light+0x2db/0x420 [ 64.156782] sock_common_recvmsg+0x13f/0x2b0 [ 64.161281] ? compat_sock_common_getsockopt+0x150/0x150 [ 64.166720] ? apparmor_socket_recvmsg+0x2a/0x30 [ 64.171462] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.177128] ? security_socket_recvmsg+0x9b/0xd0 [ 64.181872] ? compat_sock_common_getsockopt+0x150/0x150 [ 64.187309] sock_recvmsg+0xd0/0x110 [ 64.191020] __sys_recvfrom+0x30b/0x5d0 [ 64.194977] ? __ia32_sys_send+0x100/0x100 [ 64.199373] ? __sys_sendmsg+0x1a3/0x270 [ 64.203426] ? do_fast_syscall_32+0x13b/0xf98 [ 64.207924] ? do_fast_syscall_32+0x13b/0xf98 [ 64.212411] ? lockdep_hardirqs_on+0x415/0x5d0 [ 64.216979] ? trace_hardirqs_on+0xbd/0x310 [ 64.221287] ? __x32_compat_sys_get_robust_list+0x3f0/0x3f0 [ 64.227699] ? entry_SYSENTER_compat+0x70/0x7f [ 64.232381] ? trace_hardirqs_off_caller+0x300/0x300 [ 64.237533] __ia32_compat_sys_recvfrom+0xe5/0x1a0 [ 64.242564] do_fast_syscall_32+0x333/0xf98 [ 64.246928] ? do_int80_syscall_32+0x880/0x880 [ 64.251499] ? trace_hardirqs_off+0x310/0x310 [ 64.255986] ? syscall_return_slowpath+0x3b0/0x5f0 [ 64.260968] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 64.266279] ? __switch_to_asm+0x34/0x70 [ 64.270331] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.275166] entry_SYSENTER_compat+0x70/0x7f [ 64.279558] RIP: 0023:0xf7fa0869 [ 64.282913] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 64.301962] RSP: 002b:00000000f7f7b1ec EFLAGS: 00000292 ORIG_RAX: 0000000000000173 [ 64.310468] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000 [ 64.317721] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 64.324970] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 64.332219] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.339649] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 64.346907] Modules linked in: [ 64.350661] ---[ end trace c66ec4f00519d153 ]--- [ 64.355415] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 64.360468] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 a6 ca 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 97 ca 68 fb 0f 0b e8 90 ca 68 fb <0f> 0b e8 89 ca 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 64.379644] RSP: 0018:ffff888090d775b0 EFLAGS: 00010293 [ 64.384996] RAX: ffff888084b18600 RBX: ffff8880a0f8e540 RCX: ffffffff86192268 [ 64.392447] RDX: 0000000000000000 RSI: ffffffff86192ca0 RDI: 0000000000000005 [ 64.399716] RBP: ffff888090d776f0 R08: ffff888084b18600 R09: ffffed10141f1cc3 [ 64.407022] R10: ffffed10141f1cc2 R11: ffff8880a0f8e617 R12: ffff8880a0f8e5fc [ 64.414355] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 64.421629] FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000f7f7bb40 [ 64.429875] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 64.435853] CR2: 0000000020000300 CR3: 00000000a0f9a000 CR4: 00000000001406f0 [ 64.443170] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.450440] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.457701] Kernel panic - not syncing: Fatal exception [ 64.464197] Kernel Offset: disabled [ 64.467823] Rebooting in 86400 seconds..